双光子J－C模型中原子的压缩效应：数值研究途径

本文利用数值对角化方法,探讨了非旋波近似下双光子Ｊａｙｎｅｓ－Ｃｕｍｍｉｎｇｓ（Ｊ－Ｃ）模型在不同的参数条件下的原子压缩效应。结果表明,在近可积极限情形,原子压缩效应与星子崩塌与复苏现象可观察到,而在远离近可积极限情形,这些非经典现象近乎完全消失。这些结论对研究量子个可积特性提供了一定的数值依据。

Study of Atomic Squeezing in Two-Photon J-C Model:a Numerical Approach

In this papertwe have investigated by a numerical approach the squeezing of atoms under different parameter conditions in the two-photon Jaynes-Cummings (J C) model without the rotating wave approximation. Numerical results show that the squeezing of atoms and the quantum collapse-revival effect may be observed in the cases rather close to the integrable licits,while those non-classical effects disappear almost,"mpletely, in the cases far from these integrable limits. These results may provide us with some numerical evidence under investigation into the nonintegrability of quantum system.